Drilling-tool for oil-wells



(No Model.)

i J. 8: A W WOLF Drilling Tool for Oil Wells, 800. No. 242,730.

Patented June 7,1881.

Z. V W

v ww m UNITED STATES PATENT OFFICE.

JOHN WOLF AND ABRAM W. WOLF, OF BRADFORD, PENNSYLVANIA.

DRILLING-TOOL FOR OIL-WELLS, 80c.

SPECIFICATION forming part of Letters Patent No. 242,730, dated June '7,1881.

Application filed April 15, 1881.

To all whom it may concern: V

Beitknown that we, JOHN WVOLF and ABRAM W.WOLF, of Bradford,'McKeancounty, Pennsylvania', have invented new and useful 1mprovementsinDrillin g-Tools for Oil-\Vells, &c.; and we do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had'to the accompanying drawing s and the letters or figures ofreference.

marked thereon.

In drilling oil-wells small tools used upon the surface and stones oftenfall in the well and impede or entirely stop the work. This isparticularly so if the tool or stone happens to fall between the reinsof the jar. If the'jar becomes fixed it necessitates the use of anotherjar, which is fastened to the first. 'If the new jar becomes fixedanother is added, unless the first jar has become detached. To preventthese accidents a small cup, which fits the hole, has been attached tothe rope just above the rope-socket, to catch any substance that mightfall in the well. It is obvious that such a device would not answer, asthe tools ofttimes have a cutting-edge, which might sever the rope whenthey fell in the cup. This would be calamitous, as there would be noplace where the fishing-tools could catch hold, as the cup, to be in anywise effective, must be of the same, or nearly the same, diameter as thehole. No tool therefore could pass around it, and the hole wouldprobably be abandoned.

To obviate these difficulties is the object of our invention; and tothis end it consists of a tool provided with a cup shaped collar orflange, attached at any suitable point thereon, as will hereinafter bedescribed.

Referring to the drawings, Figure 1 represents a sectional view of ajar, showing our saucer-shaped collar attached thereto; Fig. 2, atransverse section on line 3 y, Fig. 1, and Fig. 3 a transverse sectionon line at 90, same figure.

B represents the common form of jar having the reins b b; D, thesinker-bar; A, the box upon the sinker -bar, and G G saucershapedflanges or collars. These flanges O are preferably made of steel, andmay be attached to the tool in any suitable mannerthat is, they may beforged or welded upon, or, if desired, may be provided withscrew-threads, which should agree with threads upon the tool.

We do not limit ourselves to any form or particular tool, but prefertoplace the saucerG upon (No model.)

the drill-jar, as this tool is the one most liable to get out of orderby any object getting among the reins b,- or we might place the saucerupon some tool above the jar-for instance, upon the box A of thesinker-bar or upon the ropesocket, as in either of these positions thesancer 0 would catch any tool or stone that might fall in the well andprevent it from interfering V with the working of the tools below.

The incline that gives the flange its saucerlike shape may be at anydesired angle; or, if

\ preferred, it may be concave, but we prefer to make it in the formshown. The edges or shoulders of the saucers should be rounded, toprevent them from catching upon the joints of the casing.

We are aware that it is not new to provide drilling-tools with flangesto steady them in the hole. These flanges are flat upon their uppersurface, and could not therefore serve thesame purpose as oursaucer-shaped flange, for the reason that the end of a tool resting uponthis flat surface would slip off if the d'rillin g-tools were lifted,and probably become fixed crosswise in the hole and prevent furtherupward movement; whereas in ours the end of the tool will rest in thehollow between the body of thetool and the circumference of the flange,and stand straight, or nearly straight, in the hole, and be drawn outwith the drillingtools without danger of it slipping outside the flange.

What we claim as new isl. A drilling-tool having a saucer-shaped flange,for the purposes mentioned, and arranged upon its upper end at anysuitable point, substantiallyas set forth.

2. A drilling-jar having a saucer-shaped flange arranged upon its upperend at any suitable point, substantially as set forth.

3. A drilling-tool having a saucer-shaped flange, for the purposesmentioned, provided with rounded edges, and arranged upon its upper endat any suit-able point, substantially as set forth.

In testimony that we claim the foregoing we have hereunto set our handsthis 12th day of April, 1881. l

JOHN WOLF. ABRAM W. WOLF. Witnesses:

D. L. Lnwrs, M. F. HALLEOK.

